Latex bang bien thien

bảng biến thiên

Mã

\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[upright]{fourier}
\usepackage[dvipsnames]{xcolor}
\usepackage{tkz-tab}
\usepackage{amsmath}
\parindent=0pt
\pagestyle{empty}
\begin{document}
\begin{tikzpicture}
\tkzTabInit%
{$x$/1,%
$f’(x)$ /1,%
 $f(x)$ /2}%
{$-\infty$ , $-\dfrac{2}{3}$ , $\dfrac{1}{3}$ , $+\infty$}%
\tkzTabLine{ ,-, 0 ,+, 0 ,-, }
\tkzTabVar %
{
+/$0$,-/$-6$ ,+/$3$,-/$0$
}
\end{tikzpicture}
\end{document}

aa